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Интерактивная система просмотра системных руководств (man-ов)

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isless (3)
  • isless (3) ( Solaris man: Библиотечные вызовы )
  • >> isless (3) ( FreeBSD man: Библиотечные вызовы )
  • isless (3) ( Русские man: Библиотечные вызовы )
  • isless (3) ( Linux man: Библиотечные вызовы )
  • isless (3) ( POSIX man: Библиотечные вызовы )

  • BSD mandoc
     

    NAME

    
    
    isgreater , isgreaterequal , isless , islessequal
    
     
    islessgreater , isunordered
    
     - compare two floating-point numbers
    
     
    

    LIBRARY

    Lb libc
    
     
    

    SYNOPSIS

       #include <math.h>
    int isgreater (real-floating x real-floating y);
    int isgreaterequal (real-floating x real-floating y);
    int isless (real-floating x real-floating y);
    int islessequal (real-floating x real-floating y);
    int islessgreater (real-floating x real-floating y);
    int isunordered (real-floating x real-floating y);
     

    DESCRIPTION

    Each of the macros isgreater (,);
    isgreaterequal (,);
    isless (,);
    islessequal (,);
    and islessgreater ();
    take arguments Fa x and Fa y and return a non-zero value if and only if its nominal relation on Fa x and Fa y is true. These macros always return zero if either argument is not a number (NaN), but unlike the corresponding C operators, they never raise a floating point exception.

    The isunordered ();
    macro takes arguments Fa x and Fa y and returns non-zero if and only if neither Fa x nor Fa y are NaNs. For any pair of floating-point values, one of the relationships (less, greater, equal, unordered) holds.  

    SEE ALSO

    fpclassify(3), math(3), signbit(3)  

    STANDARDS

    The isgreater (,);
    isgreaterequal (,);
    isless (,);
    islessequal (,);
    islessgreater (,);
    and isunordered ();
    macros conform to St -isoC-99 .  

    HISTORY

    The relational macros described above first appeared in Fx 5.1 .


     

    Index

    NAME
    LIBRARY
    SYNOPSIS
    DESCRIPTION
    SEE ALSO
    STANDARDS
    HISTORY


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